Light emitting diode

Patent metadata

Field	Value
Publication number	US-9634061-B2
Application number	US-201615150863-A
Country	US
Kind code	B2
Filing date	May 10, 2016
Priority date	Dec 21, 2012
Publication date	Apr 25, 2017
Grant date	Apr 25, 2017

Abstract

A light emitting diode including a first light emitting cell and a second light emitting cell disposed on a substrate and spaced apart from each other to expose a surface of the substrate, a first transparent layer disposed on and electrically connected to the first light emitting cell, first connection section disposed on a portion of the first light emitting cell, a second connection section disposed on a portion of the second light emitting cell, a first interconnection and a second interconnection electrically connecting the first light emitting cell and the second light emitting cell, and an insulation layer disposed between the first and second interconnections and a side surface of the first light emitting cell.

First claim

What is claimed is:

1. A light emitting diode, comprising:
a first light emitting cell disposed on a substrate;
a second light emitting cell disposed on the substrate, the second light emitting cell separated from the first light emitting cell;
a first electrode layer electrically connected to the first light emitting cell;
a first insulation layer disposed on and covering the first and second light emitting cells, the first insulation layer comprising a first opening on the first light emitting cell;
an interconnection electrically connected to the first light emitting cell and the second light emitting cell, the interconnection comprising:
a first portion and a second portion disposed on opposite sides of the second light emitting cell such that the first and second portions face each other and electrically contact the second light emitting cell;
a third portion disposed on the first light emitting cell and electrically contacting the first light emitting cell; and
a fourth portion disposed between the first and second light emitting cells and electrically connecting the third portion to the first and second portions.

2. The light emitting diode of claim 1 , wherein the first and second portions of the interconnection are substantially parallel to each other.

3. The light emitting diode of claim 2 , wherein the first and second portions of the interconnection extend away from the first light emitting cell and over the second light emitting cell such that the first and second portions extend along a periphery of the second light emitting cell.

4. The light emitting diode of claim 3 , wherein:
the third portion of the interconnection is disposed near a side of the first light emitting cell that is adjacent to the second light emitting cell; and
the third portion of the interconnection extends in a direction that is substantially perpendicular to the first and second portions.

5. The light emitting diode of claim 4 , further comprising a second insulation layer disposed between the fourth portion of the interconnection and a side surface of the first light emitting cell.

6. The light emitting diode of claim 1 , wherein the first insulation layer is disposed on the first electrode layer.

7. The light emitting diode of claim 6 , wherein the third portion of the interconnection contacts the first electrode layer through the first opening of the first insulation layer.

8. The light emitting diode of claim 7 , further comprising:
a second electrode layer electrically connected to the second light emitting cell.

9. The light emitting diode of claim 8 , wherein the first insulation layer is disposed on the second electrode layer.

10. The light emitting diode of claim 9 , wherein the first and second light emitting cells each comprising:
a lower semiconductor layer disposed on the substrate,
an upper semiconductor layer disposed on the lower semiconductor layer, and
an active layer disposed on the substrate between the lower semiconductor layer and the upper semiconductor layer.

11. The light emitting diode of claim 10 , wherein:
each of the lower semiconductor layer, the upper semiconductor layer, and the active layer of each of the first and second light emitting cells comprising a gallium nitride-based material.

12. The light emitting diode of claim 11 , wherein the gallium nitride-based material comprises at least one of gallium nitride (GaN), aluminum gallium nitride (AlGaN), and indium gallium nitride (InGaN).

13. The light emitting diode of claim 12 , wherein:
the first light emitting cell further comprises a buffer layer disposed between the substrate and the lower semiconductor layer of the first light emitting cell, and
the second light emitting cell further comprises a buffer layer disposed between the substrate and the lower semiconductor layer of the second light emitting cell.

14. The light emitting diode of claim 10 , wherein the fourth portion of the interconnection contacts a side surface of the lower semiconductor layer of the second light emitting cell.

15. The light emitting diode of claim 13 , wherein the fourth portion of the interconnection contacts the buffer layer of the second light emitting cell.

16. The light emitting diode of claim 15 , wherein the fourth portion of the interconnection contacts a side surface of the buffer layer of the second light emitting cell.

17. The light emitting diode of claim 16 , wherein the side surface of the buffer layer of the second light emitting cell is inclined.

18. The light emitting diode of claim 10 , wherein the first insulation layer is disposed directly on a side surface of the lower semiconductor layer of the second light emitting cell.

19. The light emitting diode of claim 18 , wherein the first insulation layer is disposed directly on an upper surface and a side surface of the upper semiconductor layer of the second light emitting cell.

20. The light emitting diode of claim 19 , wherein the side surfaces of the upper semiconductor layer and the lower semiconductor layer of the second light emitting cell are inclined.

Assignees

• Seoul Viosys Co Ltd

Inventors

• Lee Seom Geun
• Kim Jong Kyu
• Yoon Yeo Jin
• Kim Jae Kwon
• Kim Mae Yi

Classifications

• H01L33/42

  Electricity · mapped topic

• H01L33/145

  Electricity · mapped topic

• H01L33/0075

  Electricity · mapped topic

• H01L33/10

  Electricity · mapped topic

• H01L33/46

  Electricity · mapped topic